What is the function of a trap in a piping system?

The function of a trap in a piping system is to prevent the escape of gases while allowing liquids to flow. This is particularly important in systems that transport steam or other gases because traps are designed to hold a small amount of liquid, creating a barrier that stops gas from escaping. At the same time, the design of the trap allows condensate or liquid to drain away, ensuring that the system operates efficiently without the risk of gas leakage. This is crucial for maintaining pressure and preventing the loss of valuable gases during the operation of heating and cooling systems, as well as in various industrial processes where gas containment is important.

In contrast, other functions described in the alternatives do not align with the purpose of a trap. Increasing pressure is not a role of a trap; rather, it involves controlling or maintaining pressure within the system. Connecting pipes at different angles pertains to fittings such as elbows or tees that are essential for routing piping but do not perform the trapping function. Filtering impurities from liquids is the role of filters, whereas traps focus specifically on separating gases from liquids. Thus, the correct understanding of a trap’s function is vital for efficient pipe and steam management.